Hey gang-
Last week (while tracking down my AC fix) I replaced the radiator in my 88 xj with an all aluminum one, I've got a Mac's AL bottle, new upper & lower radiator hoses, new overflow 16 PSI cap (though I didn't need one), new 195 degree thermostat, and I've noticed that instead of the gauge tracking smack dead-on the halfway mark and not moving at all like it has for years/decades, it's just a bit over (hotter) now. No big deal, until I noticed that for the 3rd time since the above fixes it's now running hot...like @ the 75% mark (just barely ahead of the red) while moving @ 75mph on the freeway. Today it pegged to WFO, passing and moving right on thru the red zone like it wasn't no big deal, as I pulled in the garage after heading up my canyon. It did not puke coolant at all as it cooled, no gurgling sounds, and the coolant level in the mac's bottle is still good. I've heard of cooling problems while running slow/crawling thru traffic, but @ speed? I was thinking/wondering if I needed a fan clutch, but 2 shops told me mine was A-OK. The fan clutch stops immediately after turning off the key, and the electric fan works and comes on with the AC and automatically.
Any thoughts?
-greg
Last week (while tracking down my AC fix) I replaced the radiator in my 88 xj with an all aluminum one, I've got a Mac's AL bottle, new upper & lower radiator hoses, new overflow 16 PSI cap (though I didn't need one), new 195 degree thermostat, and I've noticed that instead of the gauge tracking smack dead-on the halfway mark and not moving at all like it has for years/decades, it's just a bit over (hotter) now. No big deal, until I noticed that for the 3rd time since the above fixes it's now running hot...like @ the 75% mark (just barely ahead of the red) while moving @ 75mph on the freeway. Today it pegged to WFO, passing and moving right on thru the red zone like it wasn't no big deal, as I pulled in the garage after heading up my canyon. It did not puke coolant at all as it cooled, no gurgling sounds, and the coolant level in the mac's bottle is still good. I've heard of cooling problems while running slow/crawling thru traffic, but @ speed? I was thinking/wondering if I needed a fan clutch, but 2 shops told me mine was A-OK. The fan clutch stops immediately after turning off the key, and the electric fan works and comes on with the AC and automatically.
Any thoughts?
-greg